Bitzer compressor protection module | SE-E1 Motor protector

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Part-NO Supply Order No.

34701701 AC 208-240V ±15% 15G08 SEE 11

34701710 AC 115-230V -15…+10% 15G08 SEE 12

34701702 AC 24V ±15% 15G08 SEE 13

Main data

* Ambient temperature range：-30...+70℃

* Measuring ciucuit(Type: PTC):

-R_trip 11.40 KΩ±20% /

-R_reset 2.95 KΩ±20%

* Output relay: 1SPDT

* Phase monitoring: active about 1s after motor start for about 10 seconds

* Motor voltage: 3 AC 50-60Hz 200-632V ±10%

* Dimensions: 68.4*33*80(L*W*H,in mm)

* weight: approx. 200g

Application

Monitoring of motor temperature, phase sequence and phase failure of motors in refrigerant compressors.

Functional description

After the supply voltage has been connected, a three-second initialisation period follows. Provided the PTC chain resistance is below the reset threshold(2.95KΩ), the relay trips after these 3 seconds have expired.
The SE-E1 can monitor up to nine PTC thermistors even with differing rated shut-off temperatures. If one or more PTC thermistors become highly resistive, the motor protector switches off. After cooling down below the reset threshold, a 5-minute delay period begins. When this period has expired, the relay trips again, provided all PTCs are below the reset threshold. If a second PTC error is detected within 24 hours of the first, the delay period is 60 minutes. If a third PTC error occurs within the 24-hour period, the relay switches off and locks.
The monitoring of the three-phase motor voltage becomes active 1 second after the motor has started, for a time window of 10 seconds. In case of a wrong phase sequence or a phase failure, the relay switches off and locks.
After the motor is shut off, the phase monitoring is inactive for 20 seconds to avoid an unintended shut off by a motor that possibly may be rotating in reverse.
The lock-out and delay can be removed by a mains reset(>5s).
The sensor and supply circuits are galvanically isolated from each other.
The relay output is designed as a potential-free change-over contact in closed-circuit principle.
The SE-E1 is not suitable for use with frequency converters.